47445140 has 12 divisors (see below), whose sum is σ = 99634836. Its totient is φ = 18978048.

The previous prime is 47445133. The next prime is 47445143. The reversal of 47445140 is 4154474.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9647236 + 37797904 = 3106^2 + 6148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47445143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1186109 + ... + 1186148.

It is an arithmetic number, because the mean of its divisors is an integer number (8302903).

Almost surely, 2^47445140 is an apocalyptic number.

It is an amenable number.

47445140 is an abundant number, since it is smaller than the sum of its proper divisors (52189696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47445140 is a wasteful number, since it uses less digits than its factorization.

47445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372266 (or 2372264 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 47445140 is about 6888.0432635111. The cubic root of 47445140 is about 362.0183440538.

The spelling of 47445140 in words is "forty-seven million, four hundred forty-five thousand, one hundred forty".